Intramolecular Charge Carrier Mobility in Fluorene-Thiophene Copolymer Films Studied by Microwave Conductivity
2011; American Chemical Society; Volume: 44; Issue: 9 Linguagem: Inglês
10.1021/ma2004844
ISSN1520-5835
AutoresAkinori Saeki, Takahiro Fukumatsu, Shu Seki,
Tópico(s)Organic Light-Emitting Diodes Research
ResumoThe charge carrier mobility along a molecular wire of fluorene-thiophene copolymers represented by poly(9,9′-di-n-octylfluorene-co-bithiophene): F8T2 is investigated by flash-photolysis time-resolved microwave conductivity. We systematically examined the impacts of the number of oligothiophene units, their composition ratios, and molecular weights. It is revealed that the odd−even number of oligothiophene units has a significant effect on the mobility if they are incorporated into the polyfluorene backbone in high ratio. The structural dependence study and the observed high intramolecular mobility of about 1 cm2 V−1 s−1 could be helpful for the design of novel multicomponent conjugated copolymers and its application in organic electronic devices.
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